Question

2×{7×[10-3×(x+5)]-10}=-6



vă rog repede​

Answer 1

2×{7×[10-3×(x+5)]-10}=-6

2×[7×(10-3x-15)-10]=-6

2×[7×(-3x-5)-10]=-6

2×(-21x-35-10)=-6

2×(-21x-45)=-6

-42x-90=-6

-42x=90-6

-42x=84

x=84:42

x=2